It’s good to be cautious. Drill slowly, with the assumption that you are going to hit something.
If you assume that your walls are 12mm gypsum and you stop drilling after 12mm, nothing can happen, start slowly, use the smallest drill, tape your drill as stop reference. If you hit open air you will immediately notice that you’re through. If you don’t hit open air after 12mm, stop, think, reconsider. Maybe you have thicker walls, maybe you hit a beam, etc.
The difference between gypsum, wood and steel is so big you will feel the difference if you go slowly. With gypsum you can almost push a needle through with hand force, from there make the hole bigger. Concrete walls are a totally different story.
Don’t have the intuition for how it feels once you get out on the other end of a plank yet? Dry run using a scrap piece of wood, where you can see the back side. Pin some scrap wire on the back and see what happens when the drill hits a worst case scenario. In a real wall the wire would be assembled before the final panel so there you’d have even more spacing. Logically, the wire will be behind the sheet, not embedded inside it.
If you assume that your walls are 12mm gypsum and you stop drilling after 12mm, nothing can happen, start slowly, use the smallest drill, tape your drill as stop reference. If you hit open air you will immediately notice that you’re through. If you don’t hit open air after 12mm, stop, think, reconsider. Maybe you have thicker walls, maybe you hit a beam, etc.
The difference between gypsum, wood and steel is so big you will feel the difference if you go slowly. With gypsum you can almost push a needle through with hand force, from there make the hole bigger. Concrete walls are a totally different story.
Don’t have the intuition for how it feels once you get out on the other end of a plank yet? Dry run using a scrap piece of wood, where you can see the back side. Pin some scrap wire on the back and see what happens when the drill hits a worst case scenario. In a real wall the wire would be assembled before the final panel so there you’d have even more spacing. Logically, the wire will be behind the sheet, not embedded inside it.